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    <title>Document</title>
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    <script>
        /* 
        slice()
        有三个或多个参数时，替换元素

        语法：
        数组名。spkice(start[, num, ele, ...]);
         start ：第一个值为插入元素的位置
          num   ：第二个值为替换的个数。
          ele...：被替换的元素
        */

        let arr = [0, 1, 2, 3, 3, 5];

          // let arr2 = arr.splice(2, 2, "张飞", "牛肉", "手机", "鼠标");
    // console.log(arr, arr2);

    //如果第二个值为0，则不替换，直接插入6,7,8;
    let arr2 = arr.splice(2, 0, "张飞", "牛肉", "手机", "鼠标");
    console.log(arr, arr2);
    </script>
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